X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 26 Jul 2013 12:47:38 -0400 Message-ID: X-Original-Return-Path: Received: from col0-omc3-s3.col0.hotmail.com ([65.55.34.141] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6391916 for lml@lancaironline.net; Fri, 26 Jul 2013 09:43:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.55.34.141; envelope-from=peterpawaviation@hotmail.com Received: from COL129-W35 ([65.55.34.136]) by col0-omc3-s3.col0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Fri, 26 Jul 2013 06:43:20 -0700 X-TMN: [eDlhIoFDwasyKi30ufyvCrIUoQp2vdgS] X-Originating-Email: [peterpawaviation@hotmail.com] X-Original-Message-ID: X-Original-Return-Path: peterpawaviation@hotmail.com Content-Type: multipart/alternative; boundary="_edeeebe2-78b7-4674-9857-5da78982f584_" From: PETER WILLIAMS X-Original-To: Lancair Mailing List Subject: THE WHY to Potential Problem-Engine Vibration X-Original-Date: Fri, 26 Jul 2013 09:43:19 -0400 Importance: Normal In-Reply-To: References: MIME-Version: 1.0 X-OriginalArrivalTime: 26 Jul 2013 13:43:20.0120 (UTC) FILETIME=[17089B80:01CE8A06] --_edeeebe2-78b7-4674-9857-5da78982f584_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable HI THERE Cape Air runs over 70 twin Cessna 402s.=20 in 2007 they had two of their TSIO520 exploded. the counterweights came= loose and literally=20 destroyed the case and engine. they shut down operations and rebuilt about = 100 engines in a week. IT TURNS OUT they were running them at minimum RPM and HIGH manifold pressure. withi= n limits stated in the operating manual. something like 2000 RPM and 40" MP.=20 CESSNA=2C FAA=2C Continental Engines=2C TAS aviation and others met to exam= ine the destroyed engines. THE RESULT - DO NOT use the extremes of the power chart=3B notwithstanding th= at the information remains in the Cessna operation manuals of their aircraf= t - Continental issued a service bulletin restricting certain power se= ttings NOW they run the engines at 2300 RPM and 30" MP and about 14.3 GPH fuel flow= . peter > To: lml@lancaironline.net > Date: Fri=2C 26 Jul 2013 06:22:33 -0400 > From: bknotts884@earthlink.net > Subject: [LML] Re: Potential Problem-Engine Vibration >=20 > For no particular reason=2C I was browsing through the Continental Engine= =20 > Maintenance and Overhaul Manual (M-18) for the TSIO-550 family of=20 > engines. The engine specifications are listed on pages 2-22 through=20 > 2-33. Each of these engines has a "Minimum Cruise RPM" of 2300 RPM. I= =20 > was unaware that there was any RPM restriction (other than max. RPM) on=20 > these engines. >=20 > I never go that low. My minimum cruise RPM is 2400. >=20 > Does anyone use a cruise RPM below 2300? >=20 > Barry Knotts > LIV-P=2C N4XE >=20 > -- > For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.ht= ml = --_edeeebe2-78b7-4674-9857-5da78982f584_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

HI THERE

Cape Air runs over 70 twin Cessna 402s.

=3B =3B =3B in 2007 they had tw= o of their TSIO520 exploded. the counterweights came loose and literally
<= font style=3D"" face=3D"Comic Sans MS" color=3D"#AC193D">destroyed the case= and engine. they shut down operations and rebuilt about 100 engines in a w= eek.

<= font style=3D"" face=3D"Comic Sans MS" color=3D"#AC193D">IT TURNS OUT
=3B =3B = =3B they were running them at minimum RPM and HIGH manifold pressure. withi= n limits stated in the operating manual.
=3B something like 2000 RPM and =3B 40" MP.

CESSNA=2C FAA=2C Continental Engines= =2C TAS aviation and others met to examine the destroyed engines.

THE RESULT
=3B =3B =3B =3B = =3B =3B - =3B DO =3B NOT use the extremes of the power chart=3B= notwithstanding that the information remains in the Cessna operation manua= ls of their aircraft=
=3B =3B =3B =3B =3B =3B - Continental issued a= service bulletin restricting certain power settings

NOW
=3B =3B they run the engines at 2300 R= PM and 30" MP and about 14.3 GPH fuel flow.

peter

>=3B To: lml@lancaironline.= net
>=3B Date: Fri=2C 26 Jul 2013 06:22:33 -0400
>=3B From: bknot= ts884@earthlink.net
>=3B Subject: [LML] Re: Potential Problem-Engine V= ibration
>=3B
>=3B For no particular reason=2C I was browsing th= rough the Continental Engine
>=3B Maintenance and Overhaul Manual (M-= 18) for the TSIO-550 family of
>=3B engines. The engine specificatio= ns are listed on pages 2-22 through
>=3B 2-33. Each of these engines= has a "Minimum Cruise RPM" of 2300 RPM. I
>=3B was unaware that th= ere was any RPM restriction (other than max. RPM) on
>=3B these engin= es.
>=3B
>=3B I never go that low. My minimum cruise RPM is 240= 0.
>=3B
>=3B Does anyone use a cruise RPM below 2300?
>=3B =
>=3B Barry Knotts
>=3B LIV-P=2C N4XE
>=3B
>=3B --
= >=3B For archives and unsub http://mail.lancaironline.net:81/lists/lml/Li= st.html

= --_edeeebe2-78b7-4674-9857-5da78982f584_--